Fluid motor and valve assembly



July 1, 1952 E. H. DAHLBERG 2,601,848

FLUID MOTOR AND VALVE ASSEMBLY Filed March 18, 1949 2 SHEETS- SHEET V2INVENTOR Patented July l, 1952 UNITED`ll STATES PATENT OFFICEApplication March 18, 1949, Serial No. 82,177

9 Claims. (Cl. 121-464) This invention relates generally to :duidoperated actuating devices having automatic control means therefor.

No suitable means has heretofore been pro;

vided for controlling a iiuid operated piston or other similar means forcreating fluid pressure in a line with the result thatthe actuatingdevice must be closely Watched and it must be manually controlled;otherwise, the pressure in the line Vincreases to an excessive amountresulting inthe bursting of the line thus creating a hazard to life andproperty. The manually operated control Ymeans heretofore used have beenexposed and partial opening of the valves results. No means hasheretofore been provided to automatically control an actuating devicefor a reciprocating'piston or the like in a cylinder so as to maintain apredetermined amount of pressure in the fluid line such as in thelubricant line leading to a lubricating gun.

It is, accordingly, an object of my invention to overcome the above andother defects in uid operated actuating devices and control meanstherefor and it is more particularly an object of my invention toprovide a fluid operated actuating device having automatic control meanstherefor which is simple in construction, economical in cost, economicalin manufacture, and

'eflicent in operation.

Another object of my invention is to provide a fluid operated actuatingdevice having automatic control means therefor having no exposed parts,

for manual manipulation thereof.

Another object of my invention is to provide a iiuid operated actuatingdevice having automatically operated control means therefor Wherein thecontrol valve has an exceptionally fast tripping action.

Another object of my invention is to provide automatically operatedcontrol means in an actuating device for maintaining a predeterminedfluid pressure in a line.

Another object of my invention is to provide a fluid operated actuatingdevice having automatically operated control means therefor forautomatically starting and stopping the actuating device upon apredetermined back pressure in the uid line.

Another object of my invention is to provide a novel structure andassembly and combination of parts in a fluid operated actuating devicehaving automatically operated control means therefor.

Cther objects of my invention will become evident from the followingdetailed description, taken in conjunction with the accompanyindrawings, in which Fig. 1 is a vertical sectional view of anillustration of my novel fluid operated actuating device havingautomatically operated control means therefor; i

Fig. 2 is a top plan view of my novel actuating device havingautomatically operated control' means therefor with the cap removed;

Fig. 3 is a view taken on the line 3-31 of Fig. 1; and

Fig. 4 is a fragmentary sectional view taken on the line 4--4 of Fig. 2.

Referring now to the drawings, I show in Figs. 1 to 4 inclusive a casingI comprising a base 2 with radially outwardly extending apertured ears 3for connection to any suitable `supporting means, a recessed cylindricalportion 4 on the under side of said base having a counterbore 5 forreceiving the upper end of a cylinder E, an aperture 'I disposedcentrally of said cylindrically shaped recess 4 and having a threadedcounterbore 8, a vertically extendingvalve block 9 and an angularlyextending aperture I0 having a threaded counterbore II for receiving thethreaded end I2 of a hose coupling I3 leading to a source of uid. Thebase 2 also has a vertically extending support I 5 having a transverselyextending aperture for receiving a shaft I6 to pivot one end of valvearm II. The support I5 has a threaded recess I8 on the upper sideAthereof for receiving a threaded screwIS to secure a stop member 20 onthe upper end thereof. 'I'he stop member 20 limits the vertical movementof the slide 22 engaging the face or side 2| of the support I5 which isthreadably engaged with the upper threaded end 23 of a shaft 24 whichextends through the aperture 1 in the base 2. The shaft 24 has athreaded bore 25 for threadably engaging the threaded end 26 of aA rod21` slidable in a flanged threaded member 28 and having an enlargedlower end 29, the purpose of which will be hereinafter described; m

The threaded member 28 threadably engages` a threaded aperture 3lcentrally of a piston 32 which reciprocates in the cylinder 6. Thepiston 32 also has threadably engaged therewith a tubular shaft 32awhich may be attached to a piston or any other similar device forreciprocation m counterbore 38 for slidably receivingl the tubular shaft32a. Suitable packing 39 is disposed in the threaded counterbore 38 ofthe` head 35 to sealingly engage the shaft 32a.. The head 35 has anangularly extending aperture 4I terminating in a vertically extendingrecess 42 with a threaded counterbore 43. A threaded adapter 44threadably engages the threaded counterbore 43 and is connected to theflared end 45 of a tubular line 46 by a threaded connecting member gheupper dared end 48 of the tubular member 46 is connected to an adapter-49 by a threaded connecting member 5D, the adapter-49 hr adabl en a .edwith a threaded' bular member 4B, the aperture 42, and aperturelrrligtrlblil'xen 'cf 'angperue 53 `which ter-mii-` M inthe headV 35. tothe bottom ,oivthe cylinder hatesin a trasvrseress 54 in the blockfj A Y6 thereby forcing the Instan -.-32 upwardly and second transverse recess55 in the block 9 is conicausing 'upward movement of the shaft 32a con-Iieeted in Iluid ow relationship with an aper Anected to any suitablemember for creating presture 56 which leads to atmosphere in the case"lsureln a fluid line. When the piston 32 rises that air is being used orit may lead tofthefres-L 1'" to a 4:pointl wherethe angedhmember 28strlkes ervo'r or other source of fluid in the case of-gases. the bottomof the shaft 24, 1t causes the shaft or liquids'. A third transverserecess' 5T`cn-'- 24 and r0'd'21to move upwardly thereby movmg neets influid ow relationship vvith'ar a'ngu l@ the slide T22 upwardlyon theface 2| of the suplarly extedng aperture 50 in the base 2 which port|25. When the enlarged head 18 of the pm leads to the upper side of thepiston 32 isi' the `I'l movablewith the slide 22 passes apredetercylnder u6. The recesses 51,55, andA51 in the mined point of ltsupwardmovement, the cross blockz'l'ma're ifi".vertialalignment-*and theyar' shaft-J'BL-slidesi doWnWardlyin-the elongateqslots-e.

engaged by a' cylindrical'."side valve`6|""` havin 1I ahd'12'inithemembers :5,6i and yflygthereb causing the arm I1 to snapdownW-ardlylangmoy has an outwardly jextjending stub Tshaft '5 5 nperti'jre vin'thelend 65off member IT comprisesV lspaced from the spiritthereof or from the scope of the appended claims.

What I claim is:

1. An automatically controlled fluid motor and valve assembly forconnection to a source of iiuid under pressure comprising an enclosedsealed casing, a source of fluid under pressure for said casing, acylinder, a piston movable in said cylinder, a member in said casinghaving aligned ports, the outer ports being in fluid 110W relationshipwith respective opposite ends of said cylinder and said casing and theother of said ports being adapted to exhaust fluid from either end ofsaid cylinder, a cupped slide valve adapted to cover said exhaust portand one or the other of said outer ports alternately, said valve placingsaid ports over which it is positioned in fluid flow relationship, anarm upon which said slide valve is mounted, spring means for urging saidarm` to alternate covering positions in relation to said port after apredetermined movement in the travel of said arm, and a rod actuated bysaid piston for moving said arm.

2. A fluid operated, automatically controlled motor and valve assemblyfor connection to a source of fluid under pressure comprising a sealedcasing, a source of fluid under pressure for said casing. a pivoted armin said casing, a cylinder attached to said casing, a piston movable insaid cylinder, a member having three aligned aperf tures in said casing,the two outer apertures being in fluid flow relationship with respectiveopposite ends of said cylinder and said casing, a cup shaped slide valveadapted to engage said center aperture and one or the other of saidouter apertures alternately, carried on said pivoted arm, and meansactuated by said piston for actuating said arm, said valve alternatelyplacing said outer apertures in fluid flow relationship with said centeraperture to exhaust fluid from said cylinder.

3. A fluid operated, automatically controlled fluid motor and valveassembly as set forth in claim 2 wherein said means for actuating saidarm comprises a slide in said casing, a rod connecting said slide andslidably engaging said piston, means for moving said rod upwardly ordownwardly upon a predetermined movement of said piston in eitherdirection, and means connecting said slide and said arm for moving saidarm upwardly and downwardly.

4. A fluid operated, automatically controlled fluid motor and valveassembly as set forth in claim 3 wherein the means connecting said slideand said arm comprise la spring adapted to urge said arm upwardly ordownwardly upon a predetermined respective upward or downward movementof said slide.

5. A fluid operated, automatically controlled fluid motor and valveassembly as set forth in claim 3 wherein said slide has a circulargroove for receiving the enlarged head of a pin, a cross member havingan end thereof movable in an elongated, vertically extending slot insaid arm, and a spring disposed between said cross member and saidenlarged head thereof, the end of said pin extending through an aperturein said cross member to permit slidable movement of said pin in relationto said cross arm.

6. A :duid operated, automatically controlled motor and valve assemblyadapted to be connected to a source of fluid under pressure comprising acylinder, a piston reciprocable in said cylinder, a closed sealedchamber, a source of fluid for said chamber, a member having alignedports,

two of said ports being in fluid now relationship with opposite ends ofsaid cylinder and said casing and a third port for exhausting fluid fromopposite ends of said cylinder, a cupped valve movable over said portsfor placing said third exhaust port and one or the other of said portsconnecting the ends of said cylinder in fluid flow relationshipalternately, a pivoted arm upon which said valve is mounted, a, verticalelongated slot in said arm, a cross arm movable in said slot, a slide, aspring disposed between said slide and said cross arm for urgingr saidarm upwardly and downwardly after it travels a predetermined distance inan upward or a downward direction, and a rod attachedto said slide andslidably engaging said cylinder for reciprocating said slide.

'7. A fluid operated, automatically controlled motor and valve assemblyas set forth in claim 6 wherein said rod connecting said slide slidablyengages an apertured member centrally of said piston and it has ashoulder formed on the side of said rod adjacent said slide and anenlarged head on the end thereof to engage said member attached to saidpiston upon movement thereof to opposite ends of said piston to actuatesaid slide.

8. A fiuid operated, automatically controlled motor and valve assemblycomprising a, cylinder, a closed sealed chamber, a member in saidchamber having charging ports in fluid flow :relationship with oppositeends of said cylinder and said casing and a third port for exhaustingfluid from said cylinder, a cupped slide valve for covering said exhaustport andone or the other of said charging ports wherein they are influid flow relationship when said valve covers same, a pivoted arm towhich said valve is connected having parallel members with elongatedslots, a slide in said chamber having a grooved cylindrical portion, apin having an enlarged head disposed in the slots of said slide andhaving the other end thereof slidably engaged with said cross shaft, acoil spring surrounding said pin between said slide and said crossshaft, and means actuated by said piston for reciprocating said slideupon a predetermined movement thereof.

9. A fluid operated, automatically controlled motor and valve assemblyas set forth in claim 8 wherein said means for actuating said slidecornprises a rod attached to said slide and extending into said cylinderand through a, centrally apertured portion in said piston, said rodhaving an abutting shoulder formed on one side of said piston and anenlarged head on the end thereof opposite to said slide, said pistonbeingadapted to abut the shoulder and enlarged end of said rodalternately upon` a predetermined movement thereof in said cylinder toactuate said slide.

ERNEST H. DAHLIBERG.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 647,351 Wood Apr. 10, 19001,094,811 Reagan et al Apr. 28, 1914 1,282,841 Iles Oct. 29, 19182,268,898 Pelouch Jan. 6, 1942 2,448,459 Palm Aug, 31, 1948 FOREIGNPATENTS Number Country Date 8,116 Great Britain Apr. 13, 1908

